Rethinking swimming performance tests for bottom-dwelling fish: the case of European glass eel (Anguilla anguilla)
Rethinking swimming performance tests for bottom-dwelling fish: the case of European glass eel (Anguilla anguilla)
Systematic experiments on European eel (Anguilla anguilla) in their juvenile, early life stage (glass eel), were conducted to provide new insights on the fish swimming performance and propose a framework of analysis to design swimming-performance experiments for bottom-dwelling fish. In particular, we coupled experimental and computational fluid dynamics techniques to: (i) accommodate glass eel burst-and-coast swimming mode and estimate the active swimming time (t
ac), not considering coast and drift periods, (ii) estimate near-bottom velocities (U
b) experienced by the fish, rather than using bulk averages (U), (iii) investigate water temperature (T) influence on swimming ability, and (iv) identify a functional relation between U
b, t
ac and T. Results showed that burst-and-coast swimming mode was increasingly adopted by glass eel, especially when U was higher than 0.3 ms
-1. Using U rather than U
b led to an overestimation of the fish swimming performance from 18 to 32%, on average. Under the range of temperatures analyzed (from 8 to 18 °C), t
ac was strongly influenced and positively related to T. As a final result, we propose a general formula to link near-bottom velocity, water temperature and active swimming time which can be useful in ecological engineering applications and reads as Ub=0.174·(tac-0.36·T0.77).
European eel, Swimming performance, glass eel, near-bottom velocity, swimming time, water temperature
1-11
Vezza, P.
feba4aab-3d89-4d3e-826d-ca439261a285
Libardoni, F.
391ec260-64a9-460a-9573-4a16f95d5951
Manes, C.
7d9d5123-4d1b-4760-beff-d82fe0bd0acf
Tsuzaki, T.
123b7101-03d4-4db3-96da-2226154b0520
Bertoldi, W.
5d06658d-b5db-408a-968c-5207692f033b
Kemp, P.S.
9e33fba6-cccf-4eb5-965b-b70e72b11cd7
2 October 2020
Vezza, P.
feba4aab-3d89-4d3e-826d-ca439261a285
Libardoni, F.
391ec260-64a9-460a-9573-4a16f95d5951
Manes, C.
7d9d5123-4d1b-4760-beff-d82fe0bd0acf
Tsuzaki, T.
123b7101-03d4-4db3-96da-2226154b0520
Bertoldi, W.
5d06658d-b5db-408a-968c-5207692f033b
Kemp, P.S.
9e33fba6-cccf-4eb5-965b-b70e72b11cd7
Vezza, P., Libardoni, F., Manes, C., Tsuzaki, T., Bertoldi, W. and Kemp, P.S.
(2020)
Rethinking swimming performance tests for bottom-dwelling fish: the case of European glass eel (Anguilla anguilla).
Scientific Reports, 10 (1), , [16416].
(doi:10.1038/s41598-020-72957-w).
Abstract
Systematic experiments on European eel (Anguilla anguilla) in their juvenile, early life stage (glass eel), were conducted to provide new insights on the fish swimming performance and propose a framework of analysis to design swimming-performance experiments for bottom-dwelling fish. In particular, we coupled experimental and computational fluid dynamics techniques to: (i) accommodate glass eel burst-and-coast swimming mode and estimate the active swimming time (t
ac), not considering coast and drift periods, (ii) estimate near-bottom velocities (U
b) experienced by the fish, rather than using bulk averages (U), (iii) investigate water temperature (T) influence on swimming ability, and (iv) identify a functional relation between U
b, t
ac and T. Results showed that burst-and-coast swimming mode was increasingly adopted by glass eel, especially when U was higher than 0.3 ms
-1. Using U rather than U
b led to an overestimation of the fish swimming performance from 18 to 32%, on average. Under the range of temperatures analyzed (from 8 to 18 °C), t
ac was strongly influenced and positively related to T. As a final result, we propose a general formula to link near-bottom velocity, water temperature and active swimming time which can be useful in ecological engineering applications and reads as Ub=0.174·(tac-0.36·T0.77).
Text
PVezza_et_al_glass_eel_swimming_performance_REVISED_CLEAN
- Accepted Manuscript
Text
s41598-020-72957-w
- Version of Record
More information
Accepted/In Press date: 21 July 2020
e-pub ahead of print date: 2 October 2020
Published date: 2 October 2020
Additional Information:
Funding Information:
This work was funded by the UK Engineering and Physical Sciences Research Council (EPSRC) as part of the Vaccinating the Nexus project (EP/N005961/1), a multidisciplinary investigation into resilience and sustainable management of the Water-Energy-Food nexus. F.L. benefitted from a scholarship from the University of Trento.
Publisher Copyright:
© 2020, The Author(s).
Keywords:
European eel, Swimming performance, glass eel, near-bottom velocity, swimming time, water temperature
Identifiers
Local EPrints ID: 443922
URI: http://eprints.soton.ac.uk/id/eprint/443922
ISSN: 2045-2322
PURE UUID: a93548a3-5376-43e2-9982-a13e58a8db96
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Date deposited: 16 Sep 2020 16:40
Last modified: 17 Mar 2024 03:00
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Contributors
Author:
P. Vezza
Author:
F. Libardoni
Author:
C. Manes
Author:
T. Tsuzaki
Author:
W. Bertoldi
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